Hello everyone and looking for help

I have had a saltwater tank of some kind for about 20 years. Mostly in the High mountains of Colorado. I first had a 65 gallon fish tank. It did well for many years. I had two blue tuxedo urchin at that time. At one point I lost track of one of them and last the entire tank. Then I went to a 100 gal cube mainly reef tank. Things went quite well. The water out of the tap was perfect. I now have had to move to Las Vegas. The move was horrendous for everything, not just the coral. Things started to do well, and then all of a sudden no growth and a very slow die off. I still have some of the coral but I do not want to buy more until I can find out what is going on. I am at a lose. I can not keep my Ca high enough 370 is about it even dosing every day. pH = 8.3, kh = 130ppm,

Salinity = 1.026. Nitrates, Nitrites, Phosphates, Ammonia all at 0. I am doing 6 gal water changes every 10-12 days.



I have a Current LED lights. Hang on the back protein skimmer. Filter system of increasingly finer pads as well as a carbon sack I replace about every 2 months. I use Instant Ocean salt crystals with the orange label, and Brightwell aquatics Mg and Ca supplements.



I have never been so frustrated with this hobby as I am now.



Any help will be taken with gratitude.